Crushing and grinding mill



(No Model.)

3 Sheets-Shet 1. J. P. WINOHELL.

ORUSHING AND GRINDING MILL. No. 416,204.

Patented Dec. 3,, 1889.

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(No Model.) 3 Sheets-Sheet 2. J. F. WINGHELL. GRUSHING AND GRINDING MILL.

, No. 416,204. Patented Dec. 3, 1889.

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J. F. WINOHELL.

ORUSHING AND GRINDING MILL.

(No Model.)

No. 416,204. Patented Dec. 3, 1889.

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UNITED STATES PATENT OFFICE.

JAMES F. \VINCHELL, OF SPRINGFIELD, OHIO, ASSIGNOR TO THE FOOS MANUFACTURING COMPANY, OF SAME PLACE.

CRUSHING AND GRINDING MILL.

SPECIFICATION forming part of Letters Patent No. 116,204, dated December 3, 1889. Application filed August ll 1887. Serial No. 246,685. (N5 model.)

To aZl whom it may concern.-

Be it known that 1, JAMES F. \VINOHELL, a citizen of the United States, residing at Springfield, in the count-y of Clark and State of Ohio, have invented certain new and useful Improvements in Crushing and Grinding Mills, of which the following is a specification, reference being had therein to the ac companying drawings.

This invention relates to certain new and useful improvements in crushing and grinding mills.

The invention is designed as an improvement upon the invention for which Letters Patent were granted to me March 15,1887, No. 359,588, for improvements in crushing andgrinding mills, and issued to the Foos Manufacturing Company as assignee.

The principal present object in view is to provide mechanism which shall control the quantity of material that passes from the hopper to the feeding and crushing mechanism, which is located between the supply of the material and the grinding mechanism.

I Another object in view is to provide such an arrangement of the operating mechanism for the feeding-crushers as will cause them to rotate toward each other from their upper sides irrespective of the direction in which the main shaft is rotated, whereby the feed ing-crushers can be used in connection with a mill of that character in which the grindin g mechanism is run alternatively in opposite directions for the sake of getting greater use from the grinding-plates.

Another object of my invention is to provide an agitator which will act to feed the material regularly to the feeding crusher when the throat in the hopper is reduced to a small area.

In the accompanying drawings, forming a part of this specification, and on which like reference-letters indicate corresponding features, Figure 1 represents a vertical transverse sectional view of the hopper, a portion of the mill-casing, the crushing-conveyor chamber, the feeding-crushers, the crushingconveyer, and main shaft, showing the agitator, operating gear-wheel, and fly-wheel in elevation; Fig. 2, a detail view of the operating geardvheel, the ends of the feeding-crushers, and the pinions; Fig. 3, a vertical longitudinal sectional view of the hopper and cut-off, showing the operating gear and pinions, the agitator, and one of the feeding crushers in side elevation; Fig. 4, a plan view of Fig. 3; Fig. 5, an end elevation of the hopper and the several operating pinions and gear-wheel, showing the main shaft in section; Fig. 6, a corresponding view to Fig. 5 with the driving-gear shifted to the opposite feeding-crusher and the pinions of the crushers also shifted; Fig. 7, a detail and enlarged View of the agitator and its pinion; Fig. 8, a detail sectional view of one of the feedingcrushers; Fig. 9, a partial side and sectional view in detail of the hopper, the cut-off, and the cutoff clamp; and Fig. 10, a plan view of the feeding-crushers, showing the relative positions of the protuberances.

The letter A designates the lower part of the mill frame or casing, which is substantially like that shown in the Letters Patent already referred to, and the letter B the crushing and conveying chamber, which forms a part of the said casing. The main shaft 0 has a balance-wheel D, and in that portion which is in the chamber Bit is provided with a crushing-conveyor E, which may be of the form shown-that is to say, may consist of a cylindrical body with crushing and conveying lugs formed thereon--or may be of the character shown and described in said Letters Patent.

The letter F designates that portion of the mill-casing which stands above the chamber B, and upon which and into which the hop per G rests and feeds the material. These several parts are preferably constructed of cast-iron, and the hopper may have a supplemental upper part II, of wood or other material, to increase its capacity.

Mounted at a convenient point above the crushing-conveyer-as, for instance, in the lower part of the hopper G-are two feedingcrushers I, having each a number of protuberances J, which act to draw the material between the crushers and to crush and to partially reduce the material as it is fed to the crushing-conveyer below. The disposition of ICQ the protuberances .I upon the feeding-crushers may be left to the choice of the manufacturer or to the exigencies incident to theparticular material designed to be acted upon. By reference to Fig. 1 they will be seen to be disposed at substantially equidistant points upon the periphery of the crushers proper, and from Fig. 3 they will be seen to be disposed one or more in advance of the next one or more, so that one or more on each crusher will act at a time upon the materialr 1 These feeding-crushers, as already implied, are retated toward each other, and for this purpose are provided withintergearing pinions K and L, of like orunequal sizes. If the latter, the feeding crushers will rotate at different speeds. The pinion L, by preference, is connected with or forms a part of the hub of a driving gear-wheel M which is also mounted on one of the feeding-crushers, and which meshes with a pinion N on the main shaft C. By this means rotary mot-ion is transmitted from the main shaft to the feeding-crushers, the speed of the latter being, by preference, considerably reduced with respect to the former.

In mills of the character with which these improvements are in some instances designed to be used the grinding mechanism and main shaft are operated alternatively in the opposite directions for the purpose of securing greater use from the grindingplates. It will be observed that if the main shaft be rotated in the opposite direction from that shown by the arrow in Fig. 5, without a change in the posit-ion of the gear and pinions, the feeding crushers will rotate in an upward direction from their adjacent sides. This would not feed the material.

To preserve the downward rotation of the adjacent sides of the feeding-crushers, I change the position of the gear-wheel and pinion Land the pinion K from that shown in Fig. 5 to that shown in Fig. (3. From this it will be observed that when the main shaft is rotating, as shown by the arrow in the latter figure, the feeding-crushers will still be drawing down on the material. The relative sizes of the pinions K and L, and, indeed, the relative size of the pinion K and the pinion I, which operates the agitator, may be changed, if desired, so as to vary the'rclative speeds from that shown.

Referring now to the agitator, the letter Q design ates the shaft thereof, which has a suitable bearing, as a sleeve R, secured to the side of the hopper. This agitator carries the pinion P, already referred to, which receives motion through the pinion K, mounted upon one of the feeding-crushers.

The agitator proper is represented by the letter S, which is an arm extending from the shaft Q, and is either a part thereof or separately made and secured to it. This agitator rotates over the feeding-crushers, and is designed to be used principally when the cutoff is extended over the greater portion of the feeding-crushers, in which instance the throat left between the wall of the hopper and the cut-off. as seen in Figs. 3 and 4, is contracted, and consequently prevents the material from feeding as regularly as desired to the feeding-crushers. Specially is this the case with the larger classes of material, as corn-cobs, which, on account of their size, are liable to wedge and pile up in the throat without duly feeding to the crushers. To prevent this imperfect feed is the function of the agitator S, which I have found to act with perfect satisfaction.

Referring now to cut-off, the letter T designates the same. It consists of a thin plate of iron fitted through a slot in one wall of the hopper, and preferably terminating at one end in the downwardly-inclined or descending portion U, which gradually contracts the size of the threat. The edges of the portion U and of the body of the cut-off T touch the inclined walls of the hopper, and thus the cut-off is supported. The length of the inclined or descending portion U will depend upon the distance between the crushers and the place of mounting or connecting the cut-off with the hopper. As a means of holding it in any set position, a clamp is provided, consisting of a plate V, one end of which rests upon the cut-off and the other against the wall of the hopper, and of a set-screw and hand-nut \V. IVhen the plate is drawn down firmly on the cut-off, it is held, and when the plate is relieved by unscrewing the hand-nut the cut-off may be moved more or less across the hopper.

Another obj eet of inclining the portion U of the -cut-off is to allow the cut-off to pass almost entirely out of the hopper, when it will fit snugly against the wall of the hopper. \Vhen in that position, the entire length of the feeding-crushers is exposed to the downcoming material. In this case the agitator is not necessary, though, if desired, it may be used.

I do not wish to be understood as confining myself to any particular form or character of agitator, nor to the particular means for actuating it, although the agitator and the means shown and described are preferred; nor do I confine myself to a cut-off with the inclined end piece, as this piece may be vertical. Indeed, in some instances the vertical end piece is preferred.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a mill, the combination, with the hopper into which the material is fed, crushers rotatably mounted therein, and means to retate them, of a cut-off mounted above the crushers and having a substantially-horizontal portion fitted to the hopper and an inclined portion within the hopper and leading to the crushers, and its sides substantially parallel to the sides of the hopper, so that the cut-off may be adjusted near to the outer wall of the hopper, the said cut-off being arranged to expose moreor less of the crushers to the downgoing material.

2. In a mill, the combination, With'the hopper into which the material is fed and crushers rotatably mounted therein and means to rotate them, of an adjustable cut-off mounted in the hopper and above and approximately to the crushers and arranged to contract the throat through which the material passes to the crushers, and an agitator located in said throat, and means to actuate it.

3. In a mill, the combination, with the hopper into which the material is fed and two crushers rotatably mounted therein and having intermeshing pinions on their shafts, of an agitator, also mounted in the hopper and above the crushers and having a pinion meshing with one of said crusher-pinions,

and a gear-wheel, also mounted on one of said crusher-shafts, and the main shaft of the mill geared to said gear-wheel.

4. In a mill, the combination, with the reversibly-rotatable main shaft having a pinion thereon, of a hopper and two feeding-crushers mounted in the hopper, pinions on the crusher-shafts interlneshing with each other, and a driving gear-wheel changeable from one crusher-shaft to the, other and meshing with a pinion on the'main shaft, whereby the crushers rotate toward each other 011 their upper sides irrespective of the direction in which the main shaft is rotating.

5. In a mill, the combination, with a re versibly-rotatable main shaft and a hopper into which the material is fed, of two crushers mounted therein and a rotating agitator also mounted therein, intermeshing pinions on the crusher-shafts, and a pinion on the agitator-shaft meshing with one of the crusherpinions, and a driving gear-wheel changeable from one of the crusher-shafts to the other, whereby the crushers rotate toward each other on their upper sides irrespective of the direction in which the main shaft is rotated.

In testimony whereof I affiX my signature in presence of two witnesses.

JAMES F. WINCHELL. Witnesses:

CHASE STEWART, A. A. LEATMAN. 

